I am cynical that NBC will want both late night shows to originate in Manhattan. I believe that with the new NYS tax credit for the Tonight Show to relocate from California, NBC/Comcast will send its lobbyists to officials in California, Los Angeles/Burbank to demand credits/incentives to permit the 12:30 show to originate on the West Coast. Johnny Carson knew that if there was to be another show after his, a lot of things had to be different, 1. base the show in NYC, 2. a "band" (no orchastra) with a maximum of 4 members and no monologue. Plus, the shows need a different set of guests and most of the entertainment industry is in L.A. The corporate suits at Comcast know how to play both sides of the deal.